libpurple/log.c

   1 /**
   2  * @file log.c Logging API
   3  * @ingroup core
   4  */
   5
   6 /* purple
   7  *
   8  * Purple is the legal property of its developers, whose names are too numerous
   9  * to list here.  Please refer to the COPYRIGHT file distributed with this
  10  * source distribution.
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111-1301  USA
  25  */
  26
  27 #include "internal.h"
  28 #include "account.h"
  29 #include "dbus-maybe.h"
  30 #include "debug.h"
  31 #include "internal.h"
  32 #include "log.h"
  33 #include "prefs.h"
  34 #include "util.h"
  35 #include "stringref.h"
  36 #include "imgstore.h"
  37 #include "time.h"
  38
  39 static GSList *loggers = NULL;
  40
  41 static PurpleLogLogger *html_logger;
  42 static PurpleLogLogger *txt_logger;
  43 static PurpleLogLogger *old_logger;
  44
  45 struct _purple_logsize_user {
  46         char *name;
  47         PurpleAccount *account;
  48 };
  49 static GHashTable *logsize_users = NULL;
  50 static GHashTable *logsize_users_decayed = NULL;
  51
  52 static void log_get_log_sets_common(GHashTable *sets);
  53
  54 static gsize html_logger_write(PurpleLog *log, PurpleMessageFlags type,
  55                                                           const char *from, time_t time, const char *message);
  56 static void html_logger_finalize(PurpleLog *log);
  57 static GList *html_logger_list(PurpleLogType type, const char *sn, PurpleAccount *account);
  58 static GList *html_logger_list_syslog(PurpleAccount *account);
  59 static char *html_logger_read(PurpleLog *log, PurpleLogReadFlags *flags);
  60 static int html_logger_total_size(PurpleLogType type, const char *name, PurpleAccount *account);
  61
  62 static GList *old_logger_list(PurpleLogType type, const char *sn, PurpleAccount *account);
  63 static int old_logger_total_size(PurpleLogType type, const char *name, PurpleAccount *account);
  64 static char * old_logger_read (PurpleLog *log, PurpleLogReadFlags *flags);
  65 static int old_logger_size (PurpleLog *log);
  66 static void old_logger_get_log_sets(PurpleLogSetCallback cb, GHashTable *sets);
  67 static void old_logger_finalize(PurpleLog *log);
  68
  69 static gsize txt_logger_write(PurpleLog *log,
  70                                                          PurpleMessageFlags type,
  71                                                          const char *from, time_t time, const char *message);
  72 static void txt_logger_finalize(PurpleLog *log);
  73 static GList *txt_logger_list(PurpleLogType type, const char *sn, PurpleAccount *account);
  74 static GList *txt_logger_list_syslog(PurpleAccount *account);
  75 static char *txt_logger_read(PurpleLog *log, PurpleLogReadFlags *flags);
  76 static int txt_logger_total_size(PurpleLogType type, const char *name, PurpleAccount *account);
  77
  78 /**************************************************************************
  79  * PUBLIC LOGGING FUNCTIONS ***********************************************
  80  **************************************************************************/
  81
  82 PurpleLog *purple_log_new(PurpleLogType type, const char *name, PurpleAccount *account,
  83                       PurpleConversation *conv, time_t time, const struct tm *tm)
  84 {
  85         PurpleLog *log;
  86
  87         /* IMPORTANT: Make sure to initialize all the members of PurpleLog */
  88         log = g_slice_new(PurpleLog);
  89         PURPLE_DBUS_REGISTER_POINTER(log, PurpleLog);
  90
  91         log->type = type;
  92         log->name = g_strdup(purple_normalize(account, name));
  93         log->account = account;
  94         log->conv = conv;
  95         log->time = time;
  96         log->logger = purple_log_logger_get();
  97         log->logger_data = NULL;
  98
  99         if (tm == NULL)
 100                 log->tm = NULL;
 101         else
 102         {
 103                 /* There's no need to zero this as we immediately do a direct copy. */
 104                 log->tm = g_slice_new(struct tm);
 105
 106                 *(log->tm) = *tm;
 107
 108 #ifdef HAVE_STRUCT_TM_TM_ZONE
 109                 /* XXX: This is so wrong... */
 110                 if (log->tm->tm_zone != NULL)
 111                 {
 112                         char *tmp = g_locale_from_utf8(log->tm->tm_zone, -1, NULL, NULL, NULL);
 113                         if (tmp != NULL)
 114                                 log->tm->tm_zone = tmp;
 115                         else
 116                                 /* Just shove the UTF-8 bytes in and hope... */
 117                                 log->tm->tm_zone = g_strdup(log->tm->tm_zone);
 118                 }
 119 #endif
 120         }
 121
 122         if (log->logger && log->logger->create)
 123                 log->logger->create(log);
 124         return log;
 125 }
 126
 127 void purple_log_free(PurpleLog *log)
 128 {
 129         g_return_if_fail(log);
 130         if (log->logger && log->logger->finalize)
 131                 log->logger->finalize(log);
 132         g_free(log->name);
 133
 134         if (log->tm != NULL)
 135         {
 136 #ifdef HAVE_STRUCT_TM_TM_ZONE
 137                 /* XXX: This is so wrong... */
 138                 g_free((char *)log->tm->tm_zone);
 139 #endif
 140                 g_slice_free(struct tm, log->tm);
 141         }
 142
 143         PURPLE_DBUS_UNREGISTER_POINTER(log);
 144         g_slice_free(PurpleLog, log);
 145 }
 146
 147 void purple_log_write(PurpleLog *log, PurpleMessageFlags type,
 148                     const char *from, time_t time, const char *message)
 149 {
 150         struct _purple_logsize_user *lu;
 151         gsize written, total = 0;
 152         gpointer ptrsize;
 153
 154         g_return_if_fail(log);
 155         g_return_if_fail(log->logger);
 156         g_return_if_fail(log->logger->write);
 157
 158         written = (log->logger->write)(log, type, from, time, message);
 159
 160         lu = g_new(struct _purple_logsize_user, 1);
 161
 162         lu->name = g_strdup(purple_normalize(log->account, log->name));
 163         lu->account = log->account;
 164
 165         if(g_hash_table_lookup_extended(logsize_users, lu, NULL, &ptrsize)) {
 166                 char *tmp = lu->name;
 167
 168                 total = GPOINTER_TO_INT(ptrsize);
 169                 total += written;
 170                 g_hash_table_replace(logsize_users, lu, GINT_TO_POINTER(total));
 171
 172                 /* The hash table takes ownership of lu, so create a new one
 173                  * for the logsize_users_decayed check below. */
 174                 lu = g_new(struct _purple_logsize_user, 1);
 175                 lu->name = g_strdup(tmp);
 176                 lu->account = log->account;
 177         }
 178
 179         if(g_hash_table_lookup_extended(logsize_users_decayed, lu, NULL, &ptrsize)) {
 180                 total = GPOINTER_TO_INT(ptrsize);
 181                 total += written;
 182                 g_hash_table_replace(logsize_users_decayed, lu, GINT_TO_POINTER(total));
 183         } else {
 184                 g_free(lu->name);
 185                 g_free(lu);
 186         }
 187 }
 188
 189 char *purple_log_read(PurpleLog *log, PurpleLogReadFlags *flags)
 190 {
 191         PurpleLogReadFlags mflags;
 192         g_return_val_if_fail(log && log->logger, NULL);
 193         if (log->logger->read) {
 194                 char *ret = (log->logger->read)(log, flags ? flags : &mflags);
 195                 purple_str_strip_char(ret, '\r');
 196                 return ret;
 197         }
 198         return g_strdup(_("<b><font color=\"red\">The logger has no read function</font></b>"));
 199 }
 200
 201 int purple_log_get_size(PurpleLog *log)
 202 {
 203         g_return_val_if_fail(log && log->logger, 0);
 204
 205         if (log->logger->size)
 206                 return log->logger->size(log);
 207         return 0;
 208 }
 209
 210 static guint _purple_logsize_user_hash(struct _purple_logsize_user *lu)
 211 {
 212         return g_str_hash(lu->name);
 213 }
 214
 215 static guint _purple_logsize_user_equal(struct _purple_logsize_user *lu1,
 216                 struct _purple_logsize_user *lu2)
 217 {
 218         return (lu1->account == lu2->account && purple_strequal(lu1->name, lu2->name));
 219 }
 220
 221 static void _purple_logsize_user_free_key(struct _purple_logsize_user *lu)
 222 {
 223         g_free(lu->name);
 224         g_free(lu);
 225 }
 226
 227 int purple_log_get_total_size(PurpleLogType type, const char *name, PurpleAccount *account)
 228 {
 229         gpointer ptrsize;
 230         int size = 0;
 231         GSList *n;
 232         struct _purple_logsize_user *lu;
 233
 234         lu = g_new(struct _purple_logsize_user, 1);
 235         lu->name = g_strdup(purple_normalize(account, name));
 236         lu->account = account;
 237
 238         if(g_hash_table_lookup_extended(logsize_users, lu, NULL, &ptrsize)) {
 239                 size = GPOINTER_TO_INT(ptrsize);
 240                 g_free(lu->name);
 241                 g_free(lu);
 242         } else {
 243                 for (n = loggers; n; n = n->next) {
 244                         PurpleLogLogger *logger = n->data;
 245
 246                         if(logger->total_size){
 247                                 size += (logger->total_size)(type, name, account);
 248                         } else if(logger->list) {
 249                                 GList *logs = (logger->list)(type, name, account);
 250                                 int this_size = 0;
 251
 252                                 while (logs) {
 253                                         PurpleLog *log = (PurpleLog*)(logs->data);
 254                                         this_size += purple_log_get_size(log);
 255                                         purple_log_free(log);
 256                                         logs = g_list_delete_link(logs, logs);
 257                                 }
 258
 259                                 size += this_size;
 260                         }
 261                 }
 262
 263                 g_hash_table_replace(logsize_users, lu, GINT_TO_POINTER(size));
 264         }
 265         return size;
 266 }
 267
 268 gint purple_log_get_activity_score(PurpleLogType type, const char *name, PurpleAccount *account)
 269 {
 270         gpointer ptrscore;
 271         int score;
 272         GSList *n;
 273         struct _purple_logsize_user *lu;
 274         time_t now;
 275         time(&now);
 276
 277         lu = g_new(struct _purple_logsize_user, 1);
 278         lu->name = g_strdup(purple_normalize(account, name));
 279         lu->account = account;
 280
 281         if(g_hash_table_lookup_extended(logsize_users_decayed, lu, NULL, &ptrscore)) {
 282                 score = GPOINTER_TO_INT(ptrscore);
 283                 g_free(lu->name);
 284                 g_free(lu);
 285         } else {
 286                 double score_double = 0.0;
 287                 for (n = loggers; n; n = n->next) {
 288                         PurpleLogLogger *logger = n->data;
 289
 290                         if(logger->list) {
 291                                 GList *logs = (logger->list)(type, name, account);
 292
 293                                 while (logs) {
 294                                         PurpleLog *log = (PurpleLog*)(logs->data);
 295                                         /* Activity score counts bytes in the log, exponentially
 296                                            decayed with a half-life of 14 days. */
 297                                         score_double += purple_log_get_size(log) *
 298                                                 pow(0.5, difftime(now, log->time)/1209600.0);
 299                                         purple_log_free(log);
 300                                         logs = g_list_delete_link(logs, logs);
 301                                 }
 302                         }
 303                 }
 304
 305                 score = (gint) ceil(score_double);
 306                 g_hash_table_replace(logsize_users_decayed, lu, GINT_TO_POINTER(score));
 307         }
 308         return score;
 309 }
 310
 311 gboolean purple_log_is_deletable(PurpleLog *log)
 312 {
 313         g_return_val_if_fail(log != NULL, FALSE);
 314         g_return_val_if_fail(log->logger != NULL, FALSE);
 315
 316         if (log->logger->remove == NULL)
 317                 return FALSE;
 318
 319         if (log->logger->is_deletable != NULL)
 320                 return log->logger->is_deletable(log);
 321
 322         return TRUE;
 323 }
 324
 325 gboolean purple_log_delete(PurpleLog *log)
 326 {
 327         g_return_val_if_fail(log != NULL, FALSE);
 328         g_return_val_if_fail(log->logger != NULL, FALSE);
 329
 330         if (log->logger->remove != NULL)
 331                 return log->logger->remove(log);
 332
 333         return FALSE;
 334 }
 335
 336 char *
 337 purple_log_get_log_dir(PurpleLogType type, const char *name, PurpleAccount *account)
 338 {
 339         PurplePlugin *prpl;
 340         PurplePluginProtocolInfo *prpl_info;
 341         const char *prpl_name;
 342         char *acct_name;
 343         const char *target;
 344         char *dir;
 345
 346         prpl = purple_find_prpl(purple_account_get_protocol_id(account));
 347         if (!prpl)
 348                 return NULL;
 349         prpl_info = PURPLE_PLUGIN_PROTOCOL_INFO(prpl);
 350         prpl_name = prpl_info->list_icon(account, NULL);
 351
 352         acct_name = g_strdup(purple_escape_filename(purple_normalize(account,
 353                                 purple_account_get_username(account))));
 354
 355         if (type == PURPLE_LOG_CHAT) {
 356                 char *temp = g_strdup_printf("%s.chat", purple_normalize(account, name));
 357                 target = purple_escape_filename(temp);
 358                 g_free(temp);
 359         } else if(type == PURPLE_LOG_SYSTEM) {
 360                 target = ".system";
 361         } else {
 362                 target = purple_escape_filename(purple_normalize(account, name));
 363         }
 364
 365         dir = g_build_filename(purple_user_dir(), "logs", prpl_name, acct_name, target, NULL);
 366
 367         g_free(acct_name);
 368
 369         return dir;
 370 }
 371
 372 /****************************************************************************
 373  * LOGGER FUNCTIONS *********************************************************
 374  ****************************************************************************/
 375
 376 static PurpleLogLogger *current_logger = NULL;
 377
 378 static void logger_pref_cb(const char *name, PurplePrefType type,
 379                                                    gconstpointer value, gpointer data)
 380 {
 381         PurpleLogLogger *logger;
 382         GSList *l = loggers;
 383         while (l) {
 384                 logger = l->data;
 385                 if (purple_strequal(logger->id, value)) {
 386                         purple_log_logger_set(logger);
 387                         return;
 388                 }
 389                 l = l->next;
 390         }
 391         purple_log_logger_set(txt_logger);
 392 }
 393
 394
 395 PurpleLogLogger *purple_log_logger_new(const char *id, const char *name, int functions, ...)
 396 {
 397 #if 0
 398                                 void(*create)(PurpleLog *),
 399                                 gsize(*write)(PurpleLog *, PurpleMessageFlags, const char *, time_t, const char *),
 400                                 void(*finalize)(PurpleLog *),
 401                                 GList*(*list)(PurpleLogType type, const char*, PurpleAccount*),
 402                                 char*(*read)(PurpleLog*, PurpleLogReadFlags*),
 403                                 int(*size)(PurpleLog*),
 404                                 int(*total_size)(PurpleLogType type, const char *name, PurpleAccount *account),
 405                                 GList*(*list_syslog)(PurpleAccount *account),
 406                                 void(*get_log_sets)(PurpleLogSetCallback cb, GHashTable *sets),
 407                                 gboolean(*remove)(PurpleLog *log),
 408                                 gboolean(*is_deletable)(PurpleLog *log))
 409 #endif
 410         PurpleLogLogger *logger;
 411         va_list args;
 412
 413         g_return_val_if_fail(id != NULL, NULL);
 414         g_return_val_if_fail(name != NULL, NULL);
 415         g_return_val_if_fail(functions >= 1, NULL);
 416
 417         logger = g_new0(PurpleLogLogger, 1);
 418         logger->id = g_strdup(id);
 419         logger->name = g_strdup(name);
 420
 421         va_start(args, functions);
 422
 423         if (functions >= 1)
 424                 logger->create = va_arg(args, void *);
 425         if (functions >= 2)
 426                 logger->write = va_arg(args, void *);
 427         if (functions >= 3)
 428                 logger->finalize = va_arg(args, void *);
 429         if (functions >= 4)
 430                 logger->list = va_arg(args, void *);
 431         if (functions >= 5)
 432                 logger->read = va_arg(args, void *);
 433         if (functions >= 6)
 434                 logger->size = va_arg(args, void *);
 435         if (functions >= 7)
 436                 logger->total_size = va_arg(args, void *);
 437         if (functions >= 8)
 438                 logger->list_syslog = va_arg(args, void *);
 439         if (functions >= 9)
 440                 logger->get_log_sets = va_arg(args, void *);
 441         if (functions >= 10)
 442                 logger->remove = va_arg(args, void *);
 443         if (functions >= 11)
 444                 logger->is_deletable = va_arg(args, void *);
 445
 446         if (functions >= 12)
 447                 purple_debug_info("log", "Dropping new functions for logger: %s (%s)\n", name, id);
 448
 449         va_end(args);
 450
 451         return logger;
 452 }
 453
 454 void purple_log_logger_free(PurpleLogLogger *logger)
 455 {
 456         g_free(logger->name);
 457         g_free(logger->id);
 458         g_free(logger);
 459 }
 460
 461 void purple_log_logger_add (PurpleLogLogger *logger)
 462 {
 463         g_return_if_fail(logger);
 464         if (g_slist_find(loggers, logger))
 465                 return;
 466         loggers = g_slist_append(loggers, logger);
 467         if (purple_strequal(purple_prefs_get_string("/purple/logging/format"), logger->id)) {
 468                 purple_prefs_trigger_callback("/purple/logging/format");
 469         }
 470 }
 471
 472 void purple_log_logger_remove (PurpleLogLogger *logger)
 473 {
 474         g_return_if_fail(logger);
 475         loggers = g_slist_remove(loggers, logger);
 476 }
 477
 478 void purple_log_logger_set (PurpleLogLogger *logger)
 479 {
 480         g_return_if_fail(logger);
 481         current_logger = logger;
 482 }
 483
 484 PurpleLogLogger *purple_log_logger_get()
 485 {
 486         return current_logger;
 487 }
 488
 489 GList *purple_log_logger_get_options(void)
 490 {
 491         GSList *n;
 492         GList *list = NULL;
 493         PurpleLogLogger *data;
 494
 495         for (n = loggers; n; n = n->next) {
 496                 data = n->data;
 497                 if (!data->write)
 498                         continue;
 499                 list = g_list_append(list, data->name);
 500                 list = g_list_append(list, data->id);
 501         }
 502
 503         return list;
 504 }
 505
 506 gint purple_log_compare(gconstpointer y, gconstpointer z)
 507 {
 508         const PurpleLog *a = y;
 509         const PurpleLog *b = z;
 510
 511         return b->time - a->time;
 512 }
 513
 514 GList *purple_log_get_logs(PurpleLogType type, const char *name, PurpleAccount *account)
 515 {
 516         GList *logs = NULL;
 517         GSList *n;
 518         for (n = loggers; n; n = n->next) {
 519                 PurpleLogLogger *logger = n->data;
 520                 if (!logger->list)
 521                         continue;
 522                 logs = g_list_concat(logger->list(type, name, account), logs);
 523         }
 524
 525         return g_list_sort(logs, purple_log_compare);
 526 }
 527
 528 gint purple_log_set_compare(gconstpointer y, gconstpointer z)
 529 {
 530         const PurpleLogSet *a = y;
 531         const PurpleLogSet *b = z;
 532         gint ret = 0;
 533
 534         /* This logic seems weird at first...
 535          * If either account is NULL, we pretend the accounts are
 536          * equal. This allows us to detect duplicates that will
 537          * exist if one logger knows the account and another
 538          * doesn't. */
 539         if (a->account != NULL && b->account != NULL) {
 540                 ret = strcmp(purple_account_get_username(a->account), purple_account_get_username(b->account));
 541                 if (ret != 0)
 542                         return ret;
 543         }
 544
 545         ret = strcmp(a->normalized_name, b->normalized_name);
 546         if (ret != 0)
 547                 return ret;
 548
 549         return (gint)b->type - (gint)a->type;
 550 }
 551
 552 static guint
 553 log_set_hash(gconstpointer key)
 554 {
 555         const PurpleLogSet *set = key;
 556
 557         /* The account isn't hashed because we need PurpleLogSets with NULL accounts
 558          * to be found when we search by a PurpleLogSet that has a non-NULL account
 559          * but the same type and name. */
 560         return g_int_hash(&set->type) + g_str_hash(set->name);
 561 }
 562
 563 static gboolean
 564 log_set_equal(gconstpointer a, gconstpointer b)
 565 {
 566         /* I realize that the choices made for GList and GHashTable
 567          * make sense for those data types, but I wish the comparison
 568          * functions were compatible. */
 569         return !purple_log_set_compare(a, b);
 570 }
 571
 572 static void
 573 log_add_log_set_to_hash(GHashTable *sets, PurpleLogSet *set)
 574 {
 575         PurpleLogSet *existing_set = g_hash_table_lookup(sets, set);
 576
 577         if (existing_set == NULL)
 578                 g_hash_table_insert(sets, set, set);
 579         else if (existing_set->account == NULL && set->account != NULL)
 580                 g_hash_table_replace(sets, set, set);
 581         else
 582                 purple_log_set_free(set);
 583 }
 584
 585 GHashTable *purple_log_get_log_sets(void)
 586 {
 587         GSList *n;
 588         GHashTable *sets = g_hash_table_new_full(log_set_hash, log_set_equal,
 589                                                                                          (GDestroyNotify)purple_log_set_free, NULL);
 590
 591         /* Get the log sets from all the loggers. */
 592         for (n = loggers; n; n = n->next) {
 593                 PurpleLogLogger *logger = n->data;
 594
 595                 if (!logger->get_log_sets)
 596                         continue;
 597
 598                 logger->get_log_sets(log_add_log_set_to_hash, sets);
 599         }
 600
 601         log_get_log_sets_common(sets);
 602
 603         /* Return the GHashTable of unique PurpleLogSets. */
 604         return sets;
 605 }
 606
 607 void purple_log_set_free(PurpleLogSet *set)
 608 {
 609         g_return_if_fail(set != NULL);
 610
 611         g_free(set->name);
 612         if (set->normalized_name != set->name)
 613                 g_free(set->normalized_name);
 614
 615         g_slice_free(PurpleLogSet, set);
 616 }
 617
 618 GList *purple_log_get_system_logs(PurpleAccount *account)
 619 {
 620         GList *logs = NULL;
 621         GSList *n;
 622         for (n = loggers; n; n = n->next) {
 623                 PurpleLogLogger *logger = n->data;
 624                 if (!logger->list_syslog)
 625                         continue;
 626                 logs = g_list_concat(logger->list_syslog(account), logs);
 627         }
 628
 629         return g_list_sort(logs, purple_log_compare);
 630 }
 631
 632 /****************************************************************************
 633  * LOG SUBSYSTEM ************************************************************
 634  ****************************************************************************/
 635
 636 void *
 637 purple_log_get_handle(void)
 638 {
 639         static int handle;
 640
 641         return &handle;
 642 }
 643
 644 void purple_log_init(void)
 645 {
 646         void *handle = purple_log_get_handle();
 647
 648         purple_prefs_add_none("/purple/logging");
 649         purple_prefs_add_bool("/purple/logging/log_ims", TRUE);
 650         purple_prefs_add_bool("/purple/logging/log_chats", TRUE);
 651         purple_prefs_add_bool("/purple/logging/log_system", FALSE);
 652
 653         purple_prefs_add_string("/purple/logging/format", "html");
 654
 655         html_logger = purple_log_logger_new("html", _("HTML"), 11,
 656                                                                           NULL,
 657                                                                           html_logger_write,
 658                                                                           html_logger_finalize,
 659                                                                           html_logger_list,
 660                                                                           html_logger_read,
 661                                                                           purple_log_common_sizer,
 662                                                                           html_logger_total_size,
 663                                                                           html_logger_list_syslog,
 664                                                                           NULL,
 665                                                                           purple_log_common_deleter,
 666                                                                           purple_log_common_is_deletable);
 667         purple_log_logger_add(html_logger);
 668
 669         txt_logger = purple_log_logger_new("txt", _("Plain text"), 11,
 670                                                                          NULL,
 671                                                                          txt_logger_write,
 672                                                                          txt_logger_finalize,
 673                                                                          txt_logger_list,
 674                                                                          txt_logger_read,
 675                                                                          purple_log_common_sizer,
 676                                                                          txt_logger_total_size,
 677                                                                          txt_logger_list_syslog,
 678                                                                          NULL,
 679                                                                          purple_log_common_deleter,
 680                                                                          purple_log_common_is_deletable);
 681         purple_log_logger_add(txt_logger);
 682
 683         old_logger = purple_log_logger_new("old", _("Old flat format"), 9,
 684                                                                          NULL,
 685                                                                          NULL,
 686                                                                          old_logger_finalize,
 687                                                                          old_logger_list,
 688                                                                          old_logger_read,
 689                                                                          old_logger_size,
 690                                                                          old_logger_total_size,
 691                                                                          NULL,
 692                                                                          old_logger_get_log_sets);
 693         purple_log_logger_add(old_logger);
 694
 695         purple_signal_register(handle, "log-timestamp",
 696 #if SIZEOF_TIME_T == 4
 697                              purple_marshal_POINTER__POINTER_INT_BOOLEAN,
 698 #elif SIZEOF_TIME_T == 8
 699                              purple_marshal_POINTER__POINTER_INT64_BOOLEAN,
 700 #else
 701 #error Unknown size of time_t
 702 #endif
 703                              purple_value_new(PURPLE_TYPE_STRING), 3,
 704                              purple_value_new(PURPLE_TYPE_SUBTYPE,
 705                                             PURPLE_SUBTYPE_LOG),
 706 #if SIZEOF_TIME_T == 4
 707                              purple_value_new(PURPLE_TYPE_INT),
 708 #elif SIZEOF_TIME_T == 8
 709                              purple_value_new(PURPLE_TYPE_INT64),
 710 #else
 711 # error Unknown size of time_t
 712 #endif
 713                              purple_value_new(PURPLE_TYPE_BOOLEAN));
 714
 715         purple_prefs_connect_callback(NULL, "/purple/logging/format",
 716                                                             logger_pref_cb, NULL);
 717         purple_prefs_trigger_callback("/purple/logging/format");
 718
 719         logsize_users = g_hash_table_new_full((GHashFunc)_purple_logsize_user_hash,
 720                         (GEqualFunc)_purple_logsize_user_equal,
 721                         (GDestroyNotify)_purple_logsize_user_free_key, NULL);
 722         logsize_users_decayed = g_hash_table_new_full((GHashFunc)_purple_logsize_user_hash,
 723                                 (GEqualFunc)_purple_logsize_user_equal,
 724                                 (GDestroyNotify)_purple_logsize_user_free_key, NULL);
 725 }
 726
 727 void
 728 purple_log_uninit(void)
 729 {
 730         purple_signals_unregister_by_instance(purple_log_get_handle());
 731
 732         purple_log_logger_remove(html_logger);
 733         purple_log_logger_free(html_logger);
 734         html_logger = NULL;
 735
 736         purple_log_logger_remove(txt_logger);
 737         purple_log_logger_free(txt_logger);
 738         txt_logger = NULL;
 739
 740         purple_log_logger_remove(old_logger);
 741         purple_log_logger_free(old_logger);
 742         old_logger = NULL;
 743
 744         g_hash_table_destroy(logsize_users);
 745         g_hash_table_destroy(logsize_users_decayed);
 746 }
 747
 748 /****************************************************************************
 749  * LOGGERS ******************************************************************
 750  ****************************************************************************/
 751
 752 static char *log_get_timestamp(PurpleLog *log, time_t when)
 753 {
 754         gboolean show_date;
 755         char *date;
 756         struct tm tm;
 757
 758         show_date = (log->type == PURPLE_LOG_SYSTEM) || (time(NULL) > when + 20*60);
 759
 760         date = purple_signal_emit_return_1(purple_log_get_handle(),
 761                                   "log-timestamp",
 762                                   log, when, show_date);
 763         if (date != NULL)
 764                 return date;
 765
 766         tm = *(localtime(&when));
 767         if (show_date)
 768                 return g_strdup(purple_date_format_long(&tm));
 769         else
 770                 return g_strdup(purple_time_format(&tm));
 771 }
 772
 773 /* NOTE: This can return msg (which you may or may not want to g_free())
 774  * NOTE: or a newly allocated string which you MUST g_free(). */
 775 static char *
 776 convert_image_tags(const PurpleLog *log, const char *msg)
 777 {
 778         const char *tmp;
 779         const char *start;
 780         const char *end;
 781         GData *attributes;
 782         GString *newmsg = NULL;
 783
 784         tmp = msg;
 785
 786         while (purple_markup_find_tag("img", tmp, &start, &end, &attributes)) {
 787                 int imgid = 0;
 788                 char *idstr = NULL;
 789
 790                 if (newmsg == NULL)
 791                         newmsg = g_string_new("");
 792
 793                 /* copy any text before the img tag */
 794                 if (tmp < start)
 795                         g_string_append_len(newmsg, tmp, start - tmp);
 796
 797                 if ((idstr = g_datalist_get_data(&attributes, "id")) != NULL)
 798                         imgid = atoi(idstr);
 799
 800                 if (imgid != 0)
 801                 {
 802                         FILE *image_file;
 803                         char *dir;
 804                         PurpleStoredImage *image;
 805                         gconstpointer image_data;
 806                         char *new_filename = NULL;
 807                         char *path = NULL;
 808                         size_t image_byte_count;
 809
 810                         image = purple_imgstore_find_by_id(imgid);
 811                         if (image == NULL)
 812                         {
 813                                 /* This should never happen. */
 814                                 /* This *does* happen for failed Direct-IMs -DAA */
 815                                 g_string_free(newmsg, TRUE);
 816                                 g_return_val_if_reached((char *)msg);
 817                         }
 818
 819                         image_data       = purple_imgstore_get_data(image);
 820                         image_byte_count = purple_imgstore_get_size(image);
 821                         dir              = purple_log_get_log_dir(log->type, log->name, log->account);
 822                         new_filename     = purple_util_get_image_filename(image_data, image_byte_count);
 823
 824                         path = g_build_filename(dir, new_filename, NULL);
 825
 826                         /* Only save unique files. */
 827                         if (!g_file_test(path, G_FILE_TEST_EXISTS))
 828                         {
 829                                 if ((image_file = g_fopen(path, "wb")) != NULL)
 830                                 {
 831                                         if (!fwrite(image_data, image_byte_count, 1, image_file))
 832                                         {
 833                                                 purple_debug_error("log", "Error writing %s: %s\n",
 834                                                                    path, g_strerror(errno));
 835                                                 fclose(image_file);
 836
 837                                                 /* Attempt to not leave half-written files around. */
 838                                                 unlink(path);
 839                                         }
 840                                         else
 841                                         {
 842                                                 purple_debug_info("log", "Wrote image file: %s\n", path);
 843                                                 fclose(image_file);
 844                                         }
 845                                 }
 846                                 else
 847                                 {
 848                                         purple_debug_error("log", "Unable to create file %s: %s\n",
 849                                                            path, g_strerror(errno));
 850                                 }
 851                         }
 852
 853                         /* Write the new image tag */
 854                         g_string_append_printf(newmsg, "<IMG SRC=\"%s\">", new_filename);
 855                         g_free(new_filename);
 856                         g_free(path);
 857                 }
 858
 859                 /* Continue from the end of the tag */
 860                 tmp = end + 1;
 861         }
 862
 863         if (newmsg == NULL)
 864         {
 865                 /* No images were found to change. */
 866                 return (char *)msg;
 867         }
 868
 869         /* Append any remaining message data */
 870         g_string_append(newmsg, tmp);
 871
 872         return g_string_free(newmsg, FALSE);
 873 }
 874
 875 void purple_log_common_writer(PurpleLog *log, const char *ext)
 876 {
 877         PurpleLogCommonLoggerData *data = log->logger_data;
 878
 879         if (data == NULL)
 880         {
 881                 /* This log is new */
 882                 char *dir;
 883                 struct tm *tm;
 884                 const char *tz;
 885                 const char *date;
 886                 char *filename;
 887                 char *path;
 888
 889                 dir = purple_log_get_log_dir(log->type, log->name, log->account);
 890                 if (dir == NULL)
 891                         return;
 892
 893                 purple_build_dir (dir, S_IRUSR | S_IWUSR | S_IXUSR);
 894
 895                 tm = localtime(&log->time);
 896                 tz = purple_escape_filename(purple_utf8_strftime("%Z", tm));
 897                 date = purple_utf8_strftime("%Y-%m-%d.%H%M%S%z", tm);
 898
 899                 filename = g_strdup_printf("%s%s%s", date, tz, ext ? ext : "");
 900
 901                 path = g_build_filename(dir, filename, NULL);
 902                 g_free(dir);
 903                 g_free(filename);
 904
 905                 log->logger_data = data = g_slice_new0(PurpleLogCommonLoggerData);
 906
 907                 data->file = g_fopen(path, "a");
 908                 if (data->file == NULL)
 909                 {
 910                         purple_debug(PURPLE_DEBUG_ERROR, "log",
 911                                         "Could not create log file %s\n", path);
 912
 913                         if (log->conv != NULL)
 914                                 purple_conversation_write(log->conv, NULL, _("Logging of this conversation failed."),
 915                                                                                 PURPLE_MESSAGE_ERROR, time(NULL));
 916
 917                         g_free(path);
 918                         return;
 919                 }
 920                 g_free(path);
 921         }
 922 }
 923
 924 GList *purple_log_common_lister(PurpleLogType type, const char *name, PurpleAccount *account, const char *ext, PurpleLogLogger *logger)
 925 {
 926         GDir *dir;
 927         GList *list = NULL;
 928         const char *filename;
 929         char *path;
 930
 931         if(!account)
 932                 return NULL;
 933
 934         path = purple_log_get_log_dir(type, name, account);
 935         if (path == NULL)
 936                 return NULL;
 937
 938         if (!(dir = g_dir_open(path, 0, NULL)))
 939         {
 940                 g_free(path);
 941                 return NULL;
 942         }
 943
 944         while ((filename = g_dir_read_name(dir)))
 945         {
 946                 if (purple_str_has_suffix(filename, ext) &&
 947                     strlen(filename) >= (17 + strlen(ext)))
 948                 {
 949                         PurpleLog *log;
 950                         PurpleLogCommonLoggerData *data;
 951                         struct tm tm;
 952 #if defined (HAVE_TM_GMTOFF) && defined (HAVE_STRUCT_TM_TM_ZONE)
 953                         long tz_off;
 954                         const char *rest, *end;
 955                         time_t stamp = purple_str_to_time(purple_unescape_filename(filename), FALSE, &tm, &tz_off, &rest);
 956
 957                         /* As zero is a valid offset, PURPLE_NO_TZ_OFF means no offset was
 958                          * provided. See util.h. Yes, it's kinda ugly. */
 959                         if (tz_off != PURPLE_NO_TZ_OFF)
 960                                 tm.tm_gmtoff = tz_off - tm.tm_gmtoff;
 961
 962                         if (stamp == 0 || rest == NULL || (end = strchr(rest, '.')) == NULL || strchr(rest, ' ') != NULL)
 963                         {
 964                                 log = purple_log_new(type, name, account, NULL, stamp, NULL);
 965                         }
 966                         else
 967                         {
 968                                 char *tmp = g_strndup(rest, end - rest);
 969                                 tm.tm_zone = tmp;
 970                                 log = purple_log_new(type, name, account, NULL, stamp, &tm);
 971                                 g_free(tmp);
 972                         }
 973 #else
 974                         time_t stamp = purple_str_to_time(filename, FALSE, &tm, NULL, NULL);
 975
 976                         log = purple_log_new(type, name, account, NULL, stamp, (stamp != 0) ?  &tm : NULL);
 977 #endif
 978
 979                         log->logger = logger;
 980                         log->logger_data = data = g_slice_new0(PurpleLogCommonLoggerData);
 981
 982                         data->path = g_build_filename(path, filename, NULL);
 983                         list = g_list_prepend(list, log);
 984                 }
 985         }
 986         g_dir_close(dir);
 987         g_free(path);
 988         return list;
 989 }
 990
 991 int purple_log_common_total_sizer(PurpleLogType type, const char *name, PurpleAccount *account, const char *ext)
 992 {
 993         GDir *dir;
 994         int size = 0;
 995         const char *filename;
 996         char *path;
 997
 998         if(!account)
 999                 return 0;
1000
1001         path = purple_log_get_log_dir(type, name, account);
1002         if (path == NULL)
1003                 return 0;
1004
1005         if (!(dir = g_dir_open(path, 0, NULL)))
1006         {
1007                 g_free(path);
1008                 return 0;
1009         }
1010
1011         while ((filename = g_dir_read_name(dir)))
1012         {
1013                 if (purple_str_has_suffix(filename, ext) &&
1014                     strlen(filename) >= (17 + strlen(ext)))
1015                 {
1016                         char *tmp = g_build_filename(path, filename, NULL);
1017                         struct stat st;
1018                         if (g_stat(tmp, &st))
1019                         {
1020                                 purple_debug_error("log", "Error stating log file: %s\n", tmp);
1021                                 g_free(tmp);
1022                                 continue;
1023                         }
1024                         g_free(tmp);
1025                         size += st.st_size;
1026                 }
1027         }
1028         g_dir_close(dir);
1029         g_free(path);
1030         return size;
1031 }
1032
1033 int purple_log_common_sizer(PurpleLog *log)
1034 {
1035         struct stat st;
1036         PurpleLogCommonLoggerData *data = log->logger_data;
1037
1038         g_return_val_if_fail(data != NULL, 0);
1039
1040         if (!data->path || g_stat(data->path, &st))
1041                 st.st_size = 0;
1042
1043         return st.st_size;
1044 }
1045
1046 /* This will build log sets for all loggers that use the common logger
1047  * functions because they use the same directory structure. */
1048 static void log_get_log_sets_common(GHashTable *sets)
1049 {
1050         gchar *log_path = g_build_filename(purple_user_dir(), "logs", NULL);
1051         GDir *log_dir = g_dir_open(log_path, 0, NULL);
1052         const gchar *protocol;
1053
1054         if (log_dir == NULL) {
1055                 g_free(log_path);
1056                 return;
1057         }
1058
1059         while ((protocol = g_dir_read_name(log_dir)) != NULL) {
1060                 gchar *protocol_path = g_build_filename(log_path, protocol, NULL);
1061                 GDir *protocol_dir;
1062                 const gchar *username;
1063                 gchar *protocol_unescaped;
1064                 GList *account_iter;
1065                 GList *accounts = NULL;
1066
1067                 if ((protocol_dir = g_dir_open(protocol_path, 0, NULL)) == NULL) {
1068                         g_free(protocol_path);
1069                         continue;
1070                 }
1071
1072                 /* Using g_strdup() to cover the one-in-a-million chance that a
1073                  * prpl's list_icon function uses purple_unescape_filename(). */
1074                 protocol_unescaped = g_strdup(purple_unescape_filename(protocol));
1075
1076                 /* Find all the accounts for protocol. */
1077                 for (account_iter = purple_accounts_get_all() ; account_iter != NULL ; account_iter = account_iter->next) {
1078                         PurplePlugin *prpl;
1079                         PurplePluginProtocolInfo *prpl_info;
1080
1081                         prpl = purple_find_prpl(purple_account_get_protocol_id((PurpleAccount *)account_iter->data));
1082                         if (!prpl)
1083                                 continue;
1084                         prpl_info = PURPLE_PLUGIN_PROTOCOL_INFO(prpl);
1085
1086                         if (purple_strequal(protocol_unescaped, prpl_info->list_icon((PurpleAccount *)account_iter->data, NULL)))
1087                                 accounts = g_list_prepend(accounts, account_iter->data);
1088                 }
1089                 g_free(protocol_unescaped);
1090
1091                 while ((username = g_dir_read_name(protocol_dir)) != NULL) {
1092                         gchar *username_path = g_build_filename(protocol_path, username, NULL);
1093                         GDir *username_dir;
1094                         const gchar *username_unescaped;
1095                         PurpleAccount *account = NULL;
1096                         gchar *name;
1097
1098                         if ((username_dir = g_dir_open(username_path, 0, NULL)) == NULL) {
1099                                 g_free(username_path);
1100                                 continue;
1101                         }
1102
1103                         /* Find the account for username in the list of accounts for protocol. */
1104                         username_unescaped = purple_unescape_filename(username);
1105                         for (account_iter = g_list_first(accounts) ; account_iter != NULL ; account_iter = account_iter->next) {
1106                                 if (purple_strequal(((PurpleAccount *)account_iter->data)->username, username_unescaped)) {
1107                                         account = account_iter->data;
1108                                         break;
1109                                 }
1110                         }
1111
1112                         /* Don't worry about the cast, name will point to dynamically allocated memory shortly. */
1113                         while ((name = (gchar *)g_dir_read_name(username_dir)) != NULL) {
1114                                 size_t len;
1115                                 PurpleLogSet *set;
1116
1117                                 /* IMPORTANT: Always initialize all members of PurpleLogSet */
1118                                 set = g_slice_new(PurpleLogSet);
1119
1120                                 /* Unescape the filename. */
1121                                 name = g_strdup(purple_unescape_filename(name));
1122
1123                                 /* Get the (possibly new) length of name. */
1124                                 len = strlen(name);
1125
1126                                 set->type = PURPLE_LOG_IM;
1127                                 set->name = name;
1128                                 set->account = account;
1129                                 /* set->buddy is always set below */
1130                                 set->normalized_name = g_strdup(purple_normalize(account, name));
1131
1132                                 /* Check for .chat or .system at the end of the name to determine the type. */
1133                                 if (len >= 7) {
1134                                         gchar *tmp = &name[len - 7];
1135                                         if (purple_strequal(tmp, ".system")) {
1136                                                 set->type = PURPLE_LOG_SYSTEM;
1137                                                 *tmp = '\0';
1138                                         }
1139                                 }
1140                                 if (len > 5) {
1141                                         gchar *tmp = &name[len - 5];
1142                                         if (purple_strequal(tmp, ".chat")) {
1143                                                 set->type = PURPLE_LOG_CHAT;
1144                                                 *tmp = '\0';
1145                                         }
1146                                 }
1147
1148                                 /* Determine if this (account, name) combination exists as a buddy. */
1149                                 if (account != NULL && name != NULL && *name != '\0')
1150                                         set->buddy = (purple_find_buddy(account, name) != NULL);
1151                                 else
1152                                         set->buddy = FALSE;
1153
1154                                 log_add_log_set_to_hash(sets, set);
1155                         }
1156                         g_free(username_path);
1157                         g_dir_close(username_dir);
1158                 }
1159                 g_free(protocol_path);
1160                 g_dir_close(protocol_dir);
1161         }
1162         g_free(log_path);
1163         g_dir_close(log_dir);
1164 }
1165
1166 gboolean purple_log_common_deleter(PurpleLog *log)
1167 {
1168         PurpleLogCommonLoggerData *data;
1169         int ret;
1170
1171         g_return_val_if_fail(log != NULL, FALSE);
1172
1173         data = log->logger_data;
1174         if (data == NULL)
1175                 return FALSE;
1176
1177         if (data->path == NULL)
1178                 return FALSE;
1179
1180         ret = g_unlink(data->path);
1181         if (ret == 0)
1182                 return TRUE;
1183         else if (ret == -1)
1184         {
1185                 purple_debug_error("log", "Failed to delete: %s - %s\n", data->path, g_strerror(errno));
1186         }
1187         else
1188         {
1189                 /* I'm not sure that g_unlink() will ever return
1190                  * something other than 0 or -1. -- rlaager */
1191                 purple_debug_error("log", "Failed to delete: %s\n", data->path);
1192         }
1193
1194         return FALSE;
1195 }
1196
1197 gboolean purple_log_common_is_deletable(PurpleLog *log)
1198 {
1199         PurpleLogCommonLoggerData *data;
1200 #ifndef _WIN32
1201         gchar *dirname;
1202 #endif
1203
1204         g_return_val_if_fail(log != NULL, FALSE);
1205
1206         data = log->logger_data;
1207         if (data == NULL)
1208                 return FALSE;
1209
1210         if (data->path == NULL)
1211                 return FALSE;
1212
1213 #ifndef _WIN32
1214         dirname = g_path_get_dirname(data->path);
1215         if (g_access(dirname, W_OK) == 0)
1216         {
1217                 g_free(dirname);
1218                 return TRUE;
1219         }
1220         purple_debug_info("log", "access(%s) failed: %s\n", dirname, g_strerror(errno));
1221         g_free(dirname);
1222 #else
1223         /* Unless and until someone writes equivalent win32 code,
1224          * we'll assume the file is deletable. */
1225         return TRUE;
1226 #endif
1227
1228         return FALSE;
1229 }
1230
1231 static char *process_txt_log(char *txt, char *to_free)
1232 {
1233         char *tmp;
1234
1235         /* The to_free argument allows us to save a
1236          * g_strdup() in some cases. */
1237
1238         if (to_free == NULL)
1239                 to_free = txt;
1240
1241         /* g_markup_escape_text requires valid UTF-8 */
1242         if (!g_utf8_validate(txt, -1, NULL))
1243         {
1244                 tmp = purple_utf8_salvage(txt);
1245                 g_free(to_free);
1246                 to_free = txt = tmp;
1247         }
1248
1249         tmp = g_markup_escape_text(txt, -1);
1250         g_free(to_free);
1251         txt = purple_markup_linkify(tmp);
1252         g_free(tmp);
1253
1254         return txt;
1255 }
1256
1257 #if 0 /* Maybe some other time. */
1258 /****************
1259  ** XML LOGGER **
1260  ****************/
1261
1262 static const char *str_from_msg_type (PurpleMessageFlags type)
1263 {
1264
1265                 return "";
1266
1267 }
1268
1269 static void xml_logger_write(PurpleLog *log,
1270                              PurpleMessageFlags type,
1271                              const char *from, time_t time, const char *message)
1272 {
1273         char *xhtml = NULL;
1274
1275         if (!log->logger_data) {
1276                 /* This log is new.  We could use the loggers 'new' function, but
1277                  * creating a new file there would result in empty files in the case
1278                  * that you open a convo with someone, but don't say anything.
1279                  */
1280                 struct tm *tm;
1281                 const char *tz;
1282                 const char *date;
1283                 char *dir = purple_log_get_log_dir(log->type, log->name, log->account);
1284                 char *name;
1285                 char *filename;
1286
1287                 if (dir == NULL)
1288                         return;
1289
1290                 tm = localtime(&log->time);
1291                 tz = purple_escape_filename(purple_utf8_strftime("%Z", tm);
1292                 date = purple_utf8_strftime("%Y-%m-%d.%H%M%S%z", tm);
1293
1294                 name = g_strdup_printf("%s%s%s", date, tz, ext ? ext : "");
1295
1296                 purple_build_dir (dir, S_IRUSR | S_IWUSR | S_IXUSR);
1297
1298                 filename = g_build_filename(dir, name, NULL);
1299                 g_free(dir);
1300                 g_free(name);
1301
1302                 log->logger_data = g_fopen(filename, "a");
1303                 if (!log->logger_data) {
1304                         purple_debug(PURPLE_DEBUG_ERROR, "log", "Could not create log file %s\n", filename);
1305                         g_free(filename);
1306                         return;
1307                 }
1308                 g_free(filename);
1309                 fprintf(log->logger_data, "<?xml version='1.0' encoding='UTF-8' ?>\n"
1310                         "<?xml-stylesheet href='file:///usr/src/web/htdocs/log-stylesheet.xsl' type='text/xml' ?>\n");
1311
1312                 date = purple_utf8_strftime("%Y-%m-%d %H:%M:%S", localtime(&log->time));
1313                 fprintf(log->logger_data, "<conversation time='%s' screenname='%s' protocol='%s'>\n",
1314                         date, log->name, prpl);
1315         }
1316
1317         /* if we can't write to the file, give up before we hurt ourselves */
1318         if(!data->file)
1319                 return;
1320
1321         date = log_get_timestamp(log, time);
1322
1323         purple_markup_html_to_xhtml(message, &xhtml, NULL);
1324         if (from)
1325                 fprintf(log->logger_data, "<message %s %s from='%s' time='%s'>%s</message>\n",
1326                         str_from_msg_type(type),
1327                         type & PURPLE_MESSAGE_SEND ? "direction='sent'" :
1328                         type & PURPLE_MESSAGE_RECV ? "direction='received'" : "",
1329                         from, date, xhtml);
1330         else
1331                 fprintf(log->logger_data, "<message %s %s time='%s'>%s</message>\n",
1332                         str_from_msg_type(type),
1333                         type & PURPLE_MESSAGE_SEND ? "direction='sent'" :
1334                         type & PURPLE_MESSAGE_RECV ? "direction='received'" : "",
1335                         date, xhtml):
1336         fflush(log->logger_data);
1337         g_free(date);
1338         g_free(xhtml);
1339 }
1340
1341  static void xml_logger_finalize(PurpleLog *log)
1342 {
1343         if (log->logger_data) {
1344                 fprintf(log->logger_data, "</conversation>\n");
1345                 fclose(log->logger_data);
1346                 log->logger_data = NULL;
1347         }
1348 }
1349
1350 static GList *xml_logger_list(PurpleLogType type, const char *sn, PurpleAccount *account)
1351 {
1352         return purple_log_common_lister(type, sn, account, ".xml", &xml_logger);
1353 }
1354
1355 static PurpleLogLogger xml_logger =  {
1356         N_("XML"), "xml",
1357         NULL,
1358         xml_logger_write,
1359         xml_logger_finalize,
1360         xml_logger_list,
1361         NULL,
1362         NULL,
1363         NULL
1364 };
1365 #endif
1366
1367 /****************************
1368  ** HTML LOGGER *************
1369  ****************************/
1370
1371 static gsize html_logger_write(PurpleLog *log, PurpleMessageFlags type,
1372                                                           const char *from, time_t time, const char *message)
1373 {
1374         char *msg_fixed;
1375         char *image_corrected_msg;
1376         char *date;
1377         char *header;
1378         char *escaped_from;
1379         PurplePlugin *plugin = purple_find_prpl(purple_account_get_protocol_id(log->account));
1380         PurpleLogCommonLoggerData *data = log->logger_data;
1381         gsize written = 0;
1382
1383         if(!data) {
1384                 const char *prpl =
1385                         PURPLE_PLUGIN_PROTOCOL_INFO(plugin)->list_icon(log->account, NULL);
1386                 const char *date;
1387                 purple_log_common_writer(log, ".html");
1388
1389                 data = log->logger_data;
1390
1391                 /* if we can't write to the file, give up before we hurt ourselves */
1392                 if(!data->file)
1393                         return 0;
1394
1395                 date = purple_date_format_full(localtime(&log->time));
1396
1397                 written += fprintf(data->file, "<html><head>");
1398                 written += fprintf(data->file, "<meta http-equiv=\"content-type\" content=\"text/html; charset=UTF-8\">");
1399                 written += fprintf(data->file, "<title>");
1400                 if (log->type == PURPLE_LOG_SYSTEM)
1401                         header = g_strdup_printf("System log for account %s (%s) connected at %s",
1402                                         purple_account_get_username(log->account), prpl, date);
1403                 else
1404                         header = g_strdup_printf("Conversation with %s at %s on %s (%s)",
1405                                         log->name, date, purple_account_get_username(log->account), prpl);
1406
1407                 written += fprintf(data->file, "%s", header);
1408                 written += fprintf(data->file, "</title></head><body>");
1409                 written += fprintf(data->file, "<h3>%s</h3>\n", header);
1410                 g_free(header);
1411         }
1412
1413         /* if we can't write to the file, give up before we hurt ourselves */
1414         if(!data->file)
1415                 return 0;
1416
1417         escaped_from = g_markup_escape_text(from, -1);
1418
1419         image_corrected_msg = convert_image_tags(log, message);
1420         purple_markup_html_to_xhtml(image_corrected_msg, &msg_fixed, NULL);
1421
1422         /* Yes, this breaks encapsulation.  But it's a static function and
1423          * this saves a needless strdup(). */
1424         if (image_corrected_msg != message)
1425                 g_free(image_corrected_msg);
1426
1427         date = log_get_timestamp(log, time);
1428
1429         if(log->type == PURPLE_LOG_SYSTEM){
1430                 written += fprintf(data->file, "---- %s @ %s ----<br/>\n", msg_fixed, date);
1431         } else {
1432                 if (type & PURPLE_MESSAGE_SYSTEM)
1433                         written += fprintf(data->file, "<font size=\"2\">(%s)</font><b> %s</b><br/>\n", date, msg_fixed);
1434                 else if (type & PURPLE_MESSAGE_RAW)
1435                         written += fprintf(data->file, "<font size=\"2\">(%s)</font> %s<br/>\n", date, msg_fixed);
1436                 else if (type & PURPLE_MESSAGE_ERROR)
1437                         written += fprintf(data->file, "<font color=\"#FF0000\"><font size=\"2\">(%s)</font><b> %s</b></font><br/>\n", date, msg_fixed);
1438                 else if (type & PURPLE_MESSAGE_WHISPER)
1439                         written += fprintf(data->file, "<font color=\"#6C2585\"><font size=\"2\">(%s)</font><b> %s:</b></font> %s<br/>\n",
1440                                         date, escaped_from, msg_fixed);
1441                 else if (type & PURPLE_MESSAGE_AUTO_RESP) {
1442                         if (type & PURPLE_MESSAGE_SEND)
1443                                 written += fprintf(data->file, _("<font color=\"#16569E\"><font size=\"2\">(%s)</font> <b>%s &lt;AUTO-REPLY&gt;:</b></font> %s<br/>\n"), date, escaped_from, msg_fixed);
1444                         else if (type & PURPLE_MESSAGE_RECV)
1445                                 written += fprintf(data->file, _("<font color=\"#A82F2F\"><font size=\"2\">(%s)</font> <b>%s &lt;AUTO-REPLY&gt;:</b></font> %s<br/>\n"), date, escaped_from, msg_fixed);
1446                 } else if (type & PURPLE_MESSAGE_RECV) {
1447                         if(purple_message_meify(msg_fixed, -1))
1448                                 written += fprintf(data->file, "<font color=\"#062585\"><font size=\"2\">(%s)</font> <b>***%s</b></font> %s<br/>\n",
1449                                                 date, escaped_from, msg_fixed);
1450                         else
1451                                 written += fprintf(data->file, "<font color=\"#A82F2F\"><font size=\"2\">(%s)</font> <b>%s:</b></font> %s<br/>\n",
1452                                                 date, escaped_from, msg_fixed);
1453                 } else if (type & PURPLE_MESSAGE_SEND) {
1454                         if(purple_message_meify(msg_fixed, -1))
1455                                 written += fprintf(data->file, "<font color=\"#062585\"><font size=\"2\">(%s)</font> <b>***%s</b></font> %s<br/>\n",
1456                                                 date, escaped_from, msg_fixed);
1457                         else
1458                                 written += fprintf(data->file, "<font color=\"#16569E\"><font size=\"2\">(%s)</font> <b>%s:</b></font> %s<br/>\n",
1459                                                 date, escaped_from, msg_fixed);
1460                 } else {
1461                         purple_debug_error("log", "Unhandled message type.\n");
1462                         written += fprintf(data->file, "<font size=\"2\">(%s)</font><b> %s:</b></font> %s<br/>\n",
1463                                                 date, escaped_from, msg_fixed);
1464                 }
1465         }
1466         g_free(date);
1467         g_free(msg_fixed);
1468         g_free(escaped_from);
1469         fflush(data->file);
1470
1471         return written;
1472 }
1473
1474 static void html_logger_finalize(PurpleLog *log)
1475 {
1476         PurpleLogCommonLoggerData *data = log->logger_data;
1477         if (data) {
1478                 if(data->file) {
1479                         fprintf(data->file, "</body></html>\n");
1480                         fclose(data->file);
1481                 }
1482                 g_free(data->path);
1483
1484                 g_slice_free(PurpleLogCommonLoggerData, data);
1485         }
1486 }
1487
1488 static GList *html_logger_list(PurpleLogType type, const char *sn, PurpleAccount *account)
1489 {
1490         return purple_log_common_lister(type, sn, account, ".html", html_logger);
1491 }
1492
1493 static GList *html_logger_list_syslog(PurpleAccount *account)
1494 {
1495         return purple_log_common_lister(PURPLE_LOG_SYSTEM, ".system", account, ".html", html_logger);
1496 }
1497
1498 static char *html_logger_read(PurpleLog *log, PurpleLogReadFlags *flags)
1499 {
1500         char *read;
1501         PurpleLogCommonLoggerData *data = log->logger_data;
1502         *flags = PURPLE_LOG_READ_NO_NEWLINE;
1503         if (!data || !data->path)
1504                 return g_strdup(_("<font color=\"red\"><b>Unable to find log path!</b></font>"));
1505         if (g_file_get_contents(data->path, &read, NULL, NULL)) {
1506                 char *minus_header = strchr(read, '\n');
1507
1508                 if (!minus_header)
1509                         return read;
1510
1511                 minus_header = g_strdup(minus_header + 1);
1512                 g_free(read);
1513
1514                 return minus_header;
1515         }
1516         return g_strdup_printf(_("<font color=\"red\"><b>Could not read file: %s</b></font>"), data->path);
1517 }
1518
1519 static int html_logger_total_size(PurpleLogType type, const char *name, PurpleAccount *account)
1520 {
1521         return purple_log_common_total_sizer(type, name, account, ".html");
1522 }
1523
1524
1525 /****************************
1526  ** PLAIN TEXT LOGGER *******
1527  ****************************/
1528
1529 static gsize txt_logger_write(PurpleLog *log,
1530                                                          PurpleMessageFlags type,
1531                                                          const char *from, time_t time, const char *message)
1532 {
1533         char *date;
1534         PurplePlugin *plugin = purple_find_prpl(purple_account_get_protocol_id(log->account));
1535         PurpleLogCommonLoggerData *data = log->logger_data;
1536         char *stripped = NULL;
1537
1538         gsize written = 0;
1539
1540         if (data == NULL) {
1541                 /* This log is new.  We could use the loggers 'new' function, but
1542                  * creating a new file there would result in empty files in the case
1543                  * that you open a convo with someone, but don't say anything.
1544                  */
1545                 const char *prpl =
1546                         PURPLE_PLUGIN_PROTOCOL_INFO(plugin)->list_icon(log->account, NULL);
1547                 purple_log_common_writer(log, ".txt");
1548
1549                 data = log->logger_data;
1550
1551                 /* if we can't write to the file, give up before we hurt ourselves */
1552                 if(!data->file)
1553                         return 0;
1554
1555                 if (log->type == PURPLE_LOG_SYSTEM)
1556                         written += fprintf(data->file, "System log for account %s (%s) connected at %s\n",
1557                                 purple_account_get_username(log->account), prpl,
1558                                 purple_date_format_full(localtime(&log->time)));
1559                 else
1560                         written += fprintf(data->file, "Conversation with %s at %s on %s (%s)\n",
1561                                 log->name, purple_date_format_full(localtime(&log->time)),
1562                                 purple_account_get_username(log->account), prpl);
1563         }
1564
1565         /* if we can't write to the file, give up before we hurt ourselves */
1566         if(!data->file)
1567                 return 0;
1568
1569         stripped = purple_markup_strip_html(message);
1570         date = log_get_timestamp(log, time);
1571
1572         if(log->type == PURPLE_LOG_SYSTEM){
1573                 written += fprintf(data->file, "---- %s @ %s ----\n", stripped, date);
1574         } else {
1575                 if (type & PURPLE_MESSAGE_SEND ||
1576                         type & PURPLE_MESSAGE_RECV) {
1577                         if (type & PURPLE_MESSAGE_AUTO_RESP) {
1578                                 written += fprintf(data->file, _("(%s) %s <AUTO-REPLY>: %s\n"), date,
1579                                                 from, stripped);
1580                         } else {
1581                                 if(purple_message_meify(stripped, -1))
1582                                         written += fprintf(data->file, "(%s) ***%s %s\n", date, from,
1583                                                         stripped);
1584                                 else
1585                                         written += fprintf(data->file, "(%s) %s: %s\n", date, from,
1586                                                         stripped);
1587                         }
1588                 } else if (type & PURPLE_MESSAGE_SYSTEM ||
1589                         type & PURPLE_MESSAGE_ERROR ||
1590                         type & PURPLE_MESSAGE_RAW)
1591                         written += fprintf(data->file, "(%s) %s\n", date, stripped);
1592                 else if (type & PURPLE_MESSAGE_NO_LOG) {
1593                         /* This shouldn't happen */
1594                         g_free(stripped);
1595                         return written;
1596                 } else if (type & PURPLE_MESSAGE_WHISPER)
1597                         written += fprintf(data->file, "(%s) *%s* %s", date, from, stripped);
1598                 else
1599                         written += fprintf(data->file, "(%s) %s%s %s\n", date, from ? from : "",
1600                                         from ? ":" : "", stripped);
1601         }
1602         g_free(date);
1603         g_free(stripped);
1604         fflush(data->file);
1605
1606         return written;
1607 }
1608
1609 static void txt_logger_finalize(PurpleLog *log)
1610 {
1611         PurpleLogCommonLoggerData *data = log->logger_data;
1612         if (data) {
1613                 if(data->file)
1614                         fclose(data->file);
1615                 g_free(data->path);
1616
1617                 g_slice_free(PurpleLogCommonLoggerData, data);
1618         }
1619 }
1620
1621 static GList *txt_logger_list(PurpleLogType type, const char *sn, PurpleAccount *account)
1622 {
1623         return purple_log_common_lister(type, sn, account, ".txt", txt_logger);
1624 }
1625
1626 static GList *txt_logger_list_syslog(PurpleAccount *account)
1627 {
1628         return purple_log_common_lister(PURPLE_LOG_SYSTEM, ".system", account, ".txt", txt_logger);
1629 }
1630
1631 static char *txt_logger_read(PurpleLog *log, PurpleLogReadFlags *flags)
1632 {
1633         char *read, *minus_header;
1634         PurpleLogCommonLoggerData *data = log->logger_data;
1635         *flags = 0;
1636         if (!data || !data->path)
1637                 return g_strdup(_("<font color=\"red\"><b>Unable to find log path!</b></font>"));
1638         if (g_file_get_contents(data->path, &read, NULL, NULL)) {
1639                 minus_header = strchr(read, '\n');
1640
1641                 if (minus_header)
1642                         return process_txt_log(minus_header + 1, read);
1643                 else
1644                         return process_txt_log(read, NULL);
1645         }
1646         return g_strdup_printf(_("<font color=\"red\"><b>Could not read file: %s</b></font>"), data->path);
1647 }
1648
1649 static int txt_logger_total_size(PurpleLogType type, const char *name, PurpleAccount *account)
1650 {
1651         return purple_log_common_total_sizer(type, name, account, ".txt");
1652 }
1653
1654
1655 /****************
1656  * OLD LOGGER ***
1657  ****************/
1658
1659 /* The old logger doesn't write logs, only reads them.  This is to include
1660  * old logs in the log viewer transparently.
1661  */
1662
1663 struct old_logger_data {
1664         PurpleStringref *pathref;
1665         int offset;
1666         int length;
1667 };
1668
1669 static GList *old_logger_list(PurpleLogType type, const char *sn, PurpleAccount *account)
1670 {
1671         char *logfile = g_strdup_printf("%s.log", purple_normalize(account, sn));
1672         char *pathstr = g_build_filename(purple_user_dir(), "logs", logfile, NULL);
1673         PurpleStringref *pathref = purple_stringref_new(pathstr);
1674         struct stat st;
1675         time_t log_last_modified;
1676         FILE *index;
1677         FILE *file;
1678         int index_fd;
1679         char *index_tmp;
1680         char buf[BUF_LONG];
1681         struct tm tm;
1682         char month[4];
1683         struct old_logger_data *data = NULL;
1684         int logfound = 0;
1685         int lastoff = 0;
1686         int newlen;
1687         time_t lasttime = 0;
1688
1689         PurpleLog *log = NULL;
1690         GList *list = NULL;
1691
1692         g_free(logfile);
1693
1694         if (g_stat(purple_stringref_value(pathref), &st))
1695         {
1696                 purple_stringref_unref(pathref);
1697                 g_free(pathstr);
1698                 return NULL;
1699         }
1700         else
1701                 log_last_modified = st.st_mtime;
1702
1703         /* Change the .log extension to .idx */
1704         strcpy(pathstr + strlen(pathstr) - 3, "idx");
1705
1706         if (g_stat(pathstr, &st) == 0)
1707         {
1708                 if (st.st_mtime < log_last_modified)
1709                 {
1710                         purple_debug_warning("log", "Index \"%s\" exists, but is older than the log.\n", pathstr);
1711                 }
1712                 else
1713                 {
1714                         /* The index file exists and is at least as new as the log, so open it. */
1715                         if (!(index = g_fopen(pathstr, "rb")))
1716                         {
1717                                 purple_debug_error("log", "Failed to open index file \"%s\" for reading: %s\n",
1718                                                  pathstr, g_strerror(errno));
1719
1720                                 /* Fall through so that we'll parse the log file. */
1721                         }
1722                         else
1723                         {
1724                                 purple_debug_info("log", "Using index: %s\n", pathstr);
1725                                 g_free(pathstr);
1726                                 while (fgets(buf, BUF_LONG, index))
1727                                 {
1728                                         unsigned long idx_time;
1729                                         if (sscanf(buf, "%d\t%d\t%lu", &lastoff, &newlen, &idx_time) == 3)
1730                                         {
1731                                                 log = purple_log_new(PURPLE_LOG_IM, sn, account, NULL, -1, NULL);
1732                                                 log->logger = old_logger;
1733                                                 log->time = (time_t)idx_time;
1734
1735                                                 /* IMPORTANT: Always set all members of struct old_logger_data */
1736                                                 data = g_slice_new(struct old_logger_data);
1737
1738                                                 data->pathref = purple_stringref_ref(pathref);
1739                                                 data->offset = lastoff;
1740                                                 data->length = newlen;
1741
1742                                                 log->logger_data = data;
1743                                                 list = g_list_prepend(list, log);
1744                                         }
1745                                 }
1746                                 fclose(index);
1747                                 purple_stringref_unref(pathref);
1748
1749                                 return list;
1750                         }
1751                 }
1752         }
1753
1754         if (!(file = g_fopen(purple_stringref_value(pathref), "rb"))) {
1755                 purple_debug_error("log", "Failed to open log file \"%s\" for reading: %s\n",
1756                                    purple_stringref_value(pathref), g_strerror(errno));
1757                 purple_stringref_unref(pathref);
1758                 g_free(pathstr);
1759                 return NULL;
1760         }
1761
1762         index_tmp = g_strdup_printf("%s.XXXXXX", pathstr);
1763         if ((index_fd = g_mkstemp(index_tmp)) == -1) {
1764                 purple_debug_error("log", "Failed to open index temp file: %s\n",
1765                                  g_strerror(errno));
1766                 g_free(pathstr);
1767                 g_free(index_tmp);
1768                 index = NULL;
1769         } else {
1770                 if ((index = fdopen(index_fd, "wb")) == NULL)
1771                 {
1772                         purple_debug_error("log", "Failed to fdopen() index temp file: %s\n",
1773                                          g_strerror(errno));
1774                         close(index_fd);
1775                         if (index_tmp != NULL)
1776                         {
1777                                 g_unlink(index_tmp);
1778                                 g_free(index_tmp);
1779                         }
1780                         g_free(pathstr);
1781                 }
1782         }
1783
1784         while (fgets(buf, BUF_LONG, file)) {
1785                 if (strstr(buf, "---- New C") != NULL) {
1786                         int length;
1787                         int offset;
1788                         char convostart[32];
1789                         char *temp = strchr(buf, '@');
1790
1791                         if (temp == NULL || strlen(temp) < 2)
1792                                 continue;
1793
1794                         temp++;
1795                         length = strcspn(temp, "-");
1796                         if (length > 31) length = 31;
1797
1798                         offset = ftell(file);
1799
1800                         if (logfound) {
1801                                 newlen = offset - lastoff - length;
1802                                 if(strstr(buf, "----</H3><BR>")) {
1803                                         newlen -=
1804                                                 sizeof("<HR><BR><H3 Align=Center> ---- New Conversation @ ") +
1805                                                 sizeof("----</H3><BR>") - 2;
1806                                 } else {
1807                                         newlen -=
1808                                                 sizeof("---- New Conversation @ ") + sizeof("----") - 2;
1809                                 }
1810
1811                                 if(strchr(buf, '\r'))
1812                                         newlen--;
1813
1814                                 if (newlen != 0) {
1815                                         log = purple_log_new(PURPLE_LOG_IM, sn, account, NULL, -1, NULL);
1816                                         log->logger = old_logger;
1817                                         log->time = lasttime;
1818
1819                                         /* IMPORTANT: Always set all members of struct old_logger_data */
1820                                         data = g_slice_new(struct old_logger_data);
1821
1822                                         data->pathref = purple_stringref_ref(pathref);
1823                                         data->offset = lastoff;
1824                                         data->length = newlen;
1825
1826                                         log->logger_data = data;
1827                                         list = g_list_prepend(list, log);
1828
1829                                         /* XXX: There is apparently Is there a proper way to print a time_t? */
1830                                         if (index != NULL)
1831                                                 fprintf(index, "%d\t%d\t%lu\n", data->offset, data->length, (unsigned long)log->time);
1832                                 }
1833                         }
1834
1835                         logfound = 1;
1836                         lastoff = offset;
1837
1838                         g_snprintf(convostart, length, "%s", temp);
1839                         memset(&tm, 0, sizeof(tm));
1840                         sscanf(convostart, "%*s %s %d %d:%d:%d %d",
1841                                month, &tm.tm_mday, &tm.tm_hour, &tm.tm_min, &tm.tm_sec, &tm.tm_year);
1842                         /* Ugly hack, in case current locale is not English */
1843                         if (purple_strequal(month, "Jan")) {
1844                                 tm.tm_mon= 0;
1845                         } else if (purple_strequal(month, "Feb")) {
1846                                 tm.tm_mon = 1;
1847                         } else if (purple_strequal(month, "Mar")) {
1848                                 tm.tm_mon = 2;
1849                         } else if (purple_strequal(month, "Apr")) {
1850                                 tm.tm_mon = 3;
1851                         } else if (purple_strequal(month, "May")) {
1852                                 tm.tm_mon = 4;
1853                         } else if (purple_strequal(month, "Jun")) {
1854                                 tm.tm_mon = 5;
1855                         } else if (purple_strequal(month, "Jul")) {
1856                                 tm.tm_mon = 6;
1857                         } else if (purple_strequal(month, "Aug")) {
1858                                 tm.tm_mon = 7;
1859                         } else if (purple_strequal(month, "Sep")) {
1860                                 tm.tm_mon = 8;
1861                         } else if (purple_strequal(month, "Oct")) {
1862                                 tm.tm_mon = 9;
1863                         } else if (purple_strequal(month, "Nov")) {
1864                                 tm.tm_mon = 10;
1865                         } else if (purple_strequal(month, "Dec")) {
1866                                 tm.tm_mon = 11;
1867                         }
1868                         tm.tm_year -= 1900;
1869                         lasttime = mktime(&tm);
1870                 }
1871         }
1872
1873         if (logfound) {
1874                 if ((newlen = ftell(file) - lastoff) != 0) {
1875                         log = purple_log_new(PURPLE_LOG_IM, sn, account, NULL, -1, NULL);
1876                         log->logger = old_logger;
1877                         log->time = lasttime;
1878
1879                         /* IMPORTANT: Always set all members of struct old_logger_data */
1880                         data = g_slice_new(struct old_logger_data);
1881
1882                         data->pathref = purple_stringref_ref(pathref);
1883                         data->offset = lastoff;
1884                         data->length = newlen;
1885
1886                         log->logger_data = data;
1887                         list = g_list_prepend(list, log);
1888
1889                         /* XXX: Is there a proper way to print a time_t? */
1890                         if (index != NULL)
1891                                 fprintf(index, "%d\t%d\t%d\n", data->offset, data->length, (int)log->time);
1892                 }
1893         }
1894
1895         purple_stringref_unref(pathref);
1896         fclose(file);
1897         if (index != NULL)
1898         {
1899                 fclose(index);
1900
1901                 if (index_tmp == NULL)
1902                 {
1903                         g_free(pathstr);
1904                         g_return_val_if_reached(list);
1905                 }
1906
1907                 if (g_rename(index_tmp, pathstr))
1908                 {
1909                         purple_debug_warning("log", "Failed to rename index temp file \"%s\" to \"%s\": %s\n",
1910                                            index_tmp, pathstr, g_strerror(errno));
1911                         g_unlink(index_tmp);
1912                 }
1913                 else
1914                         purple_debug_info("log", "Built index: %s\n", pathstr);
1915
1916                 g_free(index_tmp);
1917                 g_free(pathstr);
1918         }
1919         return list;
1920 }
1921
1922 static int old_logger_total_size(PurpleLogType type, const char *name, PurpleAccount *account)
1923 {
1924         char *logfile = g_strdup_printf("%s.log", purple_normalize(account, name));
1925         char *pathstr = g_build_filename(purple_user_dir(), "logs", logfile, NULL);
1926         int size;
1927         struct stat st;
1928
1929         if (g_stat(pathstr, &st))
1930                 size = 0;
1931         else
1932                 size = st.st_size;
1933
1934         g_free(logfile);
1935         g_free(pathstr);
1936
1937         return size;
1938 }
1939
1940 static char * old_logger_read (PurpleLog *log, PurpleLogReadFlags *flags)
1941 {
1942         size_t result;
1943         struct old_logger_data *data = log->logger_data;
1944         const char *path = purple_stringref_value(data->pathref);
1945         FILE *file = g_fopen(path, "rb");
1946         char *read = g_malloc(data->length + 1);
1947         fseek(file, data->offset, SEEK_SET);
1948         result = fread(read, data->length, 1, file);
1949         if (result != 1)
1950                 purple_debug_error("log", "Unable to read from log file: %s\n", path);
1951         fclose(file);
1952         read[data->length] = '\0';
1953         *flags = 0;
1954         if (strstr(read, "<BR>"))
1955         {
1956                 *flags |= PURPLE_LOG_READ_NO_NEWLINE;
1957                 return read;
1958         }
1959
1960         return process_txt_log(read, NULL);
1961 }
1962
1963 static int old_logger_size (PurpleLog *log)
1964 {
1965         struct old_logger_data *data = log->logger_data;
1966         return data ? data->length : 0;
1967 }
1968
1969 static void old_logger_get_log_sets(PurpleLogSetCallback cb, GHashTable *sets)
1970 {
1971         char *log_path = g_build_filename(purple_user_dir(), "logs", NULL);
1972         GDir *log_dir = g_dir_open(log_path, 0, NULL);
1973         gchar *name;
1974         PurpleBlistNode *gnode, *cnode, *bnode;
1975
1976         g_free(log_path);
1977         if (log_dir == NULL)
1978                 return;
1979
1980         /* Don't worry about the cast, name will be filled with a dynamically allocated data shortly. */
1981         while ((name = (gchar *)g_dir_read_name(log_dir)) != NULL) {
1982                 size_t len;
1983                 gchar *ext;
1984                 PurpleLogSet *set;
1985                 gboolean found = FALSE;
1986
1987                 /* Unescape the filename. */
1988                 name = g_strdup(purple_unescape_filename(name));
1989
1990                 /* Get the (possibly new) length of name. */
1991                 len = strlen(name);
1992
1993                 if (len < 5) {
1994                         g_free(name);
1995                         continue;
1996                 }
1997
1998                 /* Make sure we're dealing with a log file. */
1999                 ext = &name[len - 4];
2000                 if (!purple_strequal(ext, ".log")) {
2001                         g_free(name);
2002                         continue;
2003                 }
2004
2005                 /* IMPORTANT: Always set all members of PurpleLogSet */
2006                 set = g_slice_new(PurpleLogSet);
2007
2008                 /* Chat for .chat at the end of the name to determine the type. */
2009                 *ext = '\0';
2010                 set->type = PURPLE_LOG_IM;
2011                 if (len > 9) {
2012                         char *tmp = &name[len - 9];
2013                         if (purple_strequal(tmp, ".chat")) {
2014                                 set->type = PURPLE_LOG_CHAT;
2015                                 *tmp = '\0';
2016                         }
2017                 }
2018
2019                 set->name = set->normalized_name = name;
2020
2021                 /* Search the buddy list to find the account and to determine if this is a buddy. */
2022                 for (gnode = purple_blist_get_root();
2023                      !found && gnode != NULL;
2024                          gnode = purple_blist_node_get_sibling_next(gnode))
2025                 {
2026                         if (!PURPLE_BLIST_NODE_IS_GROUP(gnode))
2027                                 continue;
2028
2029                         for (cnode = purple_blist_node_get_first_child(gnode);
2030                              !found && cnode != NULL;
2031                                  cnode = purple_blist_node_get_sibling_next(cnode))
2032                         {
2033                                 if (!PURPLE_BLIST_NODE_IS_CONTACT(cnode))
2034                                         continue;
2035
2036                                 for (bnode = purple_blist_node_get_first_child(cnode);
2037                                      !found && bnode != NULL;
2038                                          bnode = purple_blist_node_get_sibling_next(bnode))
2039                                 {
2040                                         PurpleBuddy *buddy = (PurpleBuddy *)bnode;
2041
2042                                         if (purple_strequal(purple_buddy_get_name(buddy), name)) {
2043                                                 set->account = purple_buddy_get_account(buddy);
2044                                                 set->buddy = TRUE;
2045                                                 found = TRUE;
2046                                         }
2047                                 }
2048                         }
2049                 }
2050
2051                 if (!found)
2052                 {
2053                         set->account = NULL;
2054                         set->buddy = FALSE;
2055                 }
2056
2057                 cb(sets, set);
2058         }
2059         g_dir_close(log_dir);
2060 }
2061
2062 static void old_logger_finalize(PurpleLog *log)
2063 {
2064         struct old_logger_data *data = log->logger_data;
2065         purple_stringref_unref(data->pathref);
2066         g_slice_free(struct old_logger_data, data);
2067 }